JP2013188980A - Three-dimensionally shaped article and three-dimensionally shaping method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a three-dimensionally shaped article capable of preventing falling down and inclining in showing and displaying the three-dimensionally shaped article and achieving a desired showing state, and to provide a method for shaping the three-dimensionally shaped article and a program for executing the shaping method.SOLUTION: A three-dimensionally shaped article has stereoscopically shaped parts 10A, 10B simulating a stereoscopically article and a base bottom part 20 with the stereoscopically shaped parts 10A, 10B arranged on the upper surface side thereof. Here, the stereoscopically shaped parts 10A, 10B cause an unbalance of a weight balance and have a shape in which the bias of a gravitational center is large. A concave part 22 becoming a wall thickness thin part is arranged in an almost whole area excepting a peripheral fringe part 21 of the base bottom part 20 in the lower surface side of the base bottom part 20, and a balance adjusting part 23 comprising a wall thickness thick part for canceling or reducing the bias of the gravitational center in the stereoscopically shaped parts 10A, 10B is arranged in the concave part 22.

Description

  The present invention relates to a three-dimensional modeled object and a three-dimensional modeled method, and more particularly to a three-dimensional modeled object suitable for display or posting and a method for modeling the three-dimensional modeled object.

  As a method for forming (modeling) a three-dimensional modeled object, a three-dimensional layered modeling method (hereinafter simply referred to as “layered modeling method”) is known. The layered modeling method generates hierarchical data indicating each hierarchical shape when the three-dimensional structure is cut into layers in a specific direction on the basis of the three-dimensional data of the three-dimensional structure to be modeled. A three-dimensional structure is formed by sequentially stacking material layers patterned in a shape corresponding to each hierarchical data. Here, as the layered modeling method, for example, an optical modeling method using a photocurable resin, a powder layering method using a metal or resin powder, a molten resin deposition method for depositing a molten resin, paper or plastic sheet or A thin plate lamination method for laminating metal thin plates is known. Among such layered manufacturing methods, the powder layering method is described in detail in Patent Document 1, for example.

  These additive manufacturing methods can manufacture 3D objects directly from 3D CAD (computer aided design) data, so that 3D CAD is widely used and used in design and manufacturing sites. This is a technology that has been rapidly spreading.

  Among the various additive manufacturing methods described above, the powder lamination method is a method in which the powder material is thinly spread on the upper surface of the stage, and the powder material in the region corresponding to the hierarchical data described above is bonded with a binder (binder), heat, a photocuring substance, or the like. A three-dimensional structure is formed by repeating the process of curing (bonding) and forming a combined body composed of one material layer while being laminated upward. In this powder lamination method, a three-dimensional structure is formed while being laminated in a laminated powder material. Therefore, for example, a three-dimensional structure with a biased center of gravity or an overhang portion is supported by the surrounding uncured (unbonded) powder material, and thus support for preventing the three-dimensional structure from being overturned or damaged during additive manufacturing. There is a feature that a three-dimensional structure can be formed easily and satisfactorily by removing uncured powder material after the formation of the three-dimensional structure without the need for members or special techniques. . In particular, by applying an inkjet method in which the binder is discharged from a printer head used in an inkjet printer, as a technique for forming a bonded body of each layer and bonding (fixing) the bonded bodies together between the layers, A three-dimensional structure can be easily and satisfactorily formed using the already established inkjet printer technology.

JP 2001-353787 A

  However, when a three-dimensional structure formed by the layered manufacturing method as described above is arranged on a table or the like, the following problems are encountered. That is, in the case of a modeled object that simulates the shape of the three-dimensional object described above, by using the above-described powder lamination method or the like, if the center of gravity of the modeled object is biased or there is an overhang portion, the three-dimensional There has been a problem that a fall or inclination of the modeled object occurs, and the desired display state cannot be realized.

  Therefore, in view of the above-described problems, the present invention aims to provide a three-dimensional structure that can prevent overturning and tilting when a three-dimensional structure is arranged, and a method for forming the three-dimensional structure. And

The three-dimensional structure according to the present invention is
In 3D objects,
One side is a flat base, and
A three-dimensional structure formed integrally with the same material as the base on the one surface side of the base,
A balance adjusting portion provided on the other surface side of the base portion which is the installation surface side;
Have
The balance adjusting unit is configured such that the position of the center of gravity of the three-dimensional structure when the three-dimensional structure is viewed in plan from the one surface side of the base is compared with the case where the balance adjusting unit is not provided. It is set so that it may approach the center part of a base part.

The three-dimensional modeling method according to the present invention is:
In the 3D modeling method,
The one surface side forms a flat plate-like base portion, and the three-dimensional modeling portion of the same material as the base portion on the one surface side of the base portion,
On the other surface side of the base portion that is the installation surface side, a position of the center of gravity of the three-dimensional structure when the three-dimensional structure is viewed in plan from the one surface side of the base portion is provided with a balance adjustment unit. The balance adjusting portion is formed so as to be closer to the center portion of the base portion than in the case where the base portion is not.

  According to the present invention, when a three-dimensional structure is arranged, it is possible to prevent a fall or inclination.

It is a schematic block diagram which shows 1st Embodiment of the three-dimensional structure based on this invention. It is a flowchart which shows an example of the modeling method of the three-dimensional structure based on 1st Embodiment. It is a flowchart which shows an example of the balance adjustment method applied to the three-dimensional data preparation process in the three-dimensional modeling method which concerns on 1st Embodiment. It is a conceptual diagram for demonstrating the balance adjustment method applied to the three-dimensional data preparation process which concerns on 1st Embodiment. It is a flowchart which shows an example of the lamination modeling process in the three-dimensional modeling method which concerns on 1st Embodiment. It is a schematic process figure (the 1) which shows the formation state of the base and solid modeling part in a layered modeling process concerning a 1st embodiment. It is a schematic process figure (the 2) which shows the formation state of the base part and solid modeling part in the additive manufacturing process which concerns on 1st Embodiment. It is a schematic process figure (the 3) which shows the formation state of the base part in the additive manufacturing process which concerns on 1st Embodiment, and a three-dimensional molded part. It is a schematic block diagram which shows the 1st comparative example for demonstrating the effect of the three-dimensional modeling thing and 3D modeling method which concern on 1st Embodiment. It is a conceptual block diagram which shows the other structural example of the three-dimensional structure based on 1st this embodiment. It is a schematic block diagram which shows 2nd Embodiment of the three-dimensional structure based on this invention. It is a conceptual diagram for demonstrating the balance adjustment method in the three-dimensional structure based on 2nd Embodiment. It is a schematic block diagram which shows the 2nd comparative example for demonstrating the effect of the three-dimensional molded item which concerns on 2nd Embodiment. It is a conceptual diagram for demonstrating the gravity center position and display state in the 2nd comparative example. It is a schematic block diagram which shows 3rd Embodiment of the three-dimensional modeling method which concerns on this invention. It is a conceptual diagram for demonstrating the balance adjustment method in the three-dimensional structure based on 3rd Embodiment. It is a schematic block diagram which shows an example of the three-dimensional modeling apparatus which can implement | achieve the three-dimensional modeling method which concerns on this invention.

Hereinafter, a three-dimensional structure, a three-dimensional structure forming method, and a program according to the present invention will be described in detail with reference to embodiments.
<First Embodiment>
(3D objects)
First, the three-dimensional structure according to the present invention will be described.

  FIG. 1 is a schematic configuration diagram showing a first embodiment of a three-dimensional structure according to the present invention. Fig.1 (a) is a perspective view which shows schematic structure of the three-dimensional structure based on this embodiment, FIG.1 (b) is the IB-IB line | wire in the three-dimensional structure shown to Fig.1 (a) ( In this specification, “I” is used as a symbol corresponding to the Roman numeral “1” shown in FIG. 1A for the sake of convenience.) FIG.

  The first embodiment of the three-dimensional structure according to the present invention includes, for example, a three-dimensional structure 10A, 10B that imitates the shape of a three-dimensional object such as a person, an animal, or an article, as shown in FIG. The three-dimensional modeling parts 10A and 10B are spaced apart and have a base part 20 provided in an arbitrary region on the upper surface side (one surface side) of the drawing. Here, the three-dimensional model | molding part 10A, 10B and the base part 20 are integrally formed with the same laminated material using the layered modeling method mentioned above. In FIGS. 1A and 1B, in order to simplify the explanation and illustration, for example, each of the three-dimensional modeling parts 10A and 10B has a polyhedral shape with flat surfaces, and has a rectangular flat plate structure. The case where it is provided so that it may protrude in the specific extension direction from the upper surface of the base 20 which has is shown.

  Specifically, as illustrated in FIGS. 1A and 1B, the three-dimensional structure 10 </ b> A has an acute angle θ between the surface direction of the side surface and the surface direction of the upper surface of the base portion 20, for example. Projecting in the direction toward the outside of the base portion 20, and the projecting amount (volume, projecting dimension and shape) is larger than that of the three-dimensional structure 10B. On the other hand, the three-dimensional modeled portion 10B has a shape that protrudes in a substantially vertical direction with respect to the upper surface of the base portion 20, for example, and has a smaller volume than the three-dimensional modeled portion 10A. That is, since these three-dimensional model | molded parts 10A and 10B are formed with the same material, there exists a difference in the weight compared with each volume, the balance of weight is not balanced, and the three-dimensional model | molded parts 10A and 10B. As a whole, the center of gravity has a shape shifted from the center of the three-dimensional structure. As described above, due to the bias of the center of gravity of the three-dimensional modeled portions 10A and 10B, if only the three-dimensional modeled portions 10A and 10B are viewed, there is a risk of falling in the A direction.

  Further, the base portion 20 arranges the three-dimensional modeling portions 10A and 10B integrally formed on the upper surface side at a predetermined position on an installation surface HL such as a horizontal base or a floor surface for display and display. Therefore, it has a flat plate-like structure having a predetermined spread (or area). Here, the lower surface side (other surface side) of the base portion 20 is in direct contact with the installation surface HL. For example, as shown in FIGS. A concave portion 22 that is a thin portion is provided in substantially the entire region excluding the peripheral portion 21. The peripheral edge 21 protrudes on the lower surface side so as to surround the recess 22. That is, the concave portion 22 has a counterbore shape that is shallower than the thickness of the base portion 20 (the dimension between the upper surface and the lower surface). Further, in the concave portion 22 is provided a balance adjusting portion 23 formed of a thick portion for offsetting or reducing the deviation of the center of gravity in the three-dimensional modeling portions 10A and 10B described above. Here, the balance adjusting unit 23 is formed simultaneously and integrally with the same material as the base unit 20 and the three-dimensional modeled units 10A and 10B, and is formed to be equal to or thinner than the depth of the recess 22. Thus, the base portion 20 is configured not to protrude from the lower surface. That is, the balance adjusting unit 23 does not protrude below the peripheral edge 21 so as not to prevent the peripheral edge 21 from always contacting the installation surface HL.

  The setting method of the balance adjusting unit 23 will be described in detail later. Conceptually, as shown in FIG. 4A, the base portion 20 excluding the balance adjustment portion 23 and all the three-dimensional modeling portions 10 </ b> A and 10 </ b> B integrally formed on the upper surface of the base portion 20 are configured. The position Pc of the center of gravity of the three-dimensional structure in the plan view of the base 20 from the top of FIGS. 1A and 1B is disposed outside the region corresponding to the base 20, for example. As shown in FIG. 4 (b), a three-dimensional structure composed of the base part 20 provided with the balance adjusting part 23 and all the three-dimensional model parts 10A and 10B integrally formed on the upper surface of the base part 20. The position Pc of the center of gravity when the base 20 is viewed in plan from above in FIGS. 1A and 1B is, for example, a region corresponding to the base 20 so that the three-dimensional structure does not fall down due to the bias of the center of gravity. Balance adjustment unit 2 so that it exists inside (within range) Installation position and planar extent of (the area or plane shape), thickness and the like are set.

(Three-dimensional modeling method)
Next, a method (three-dimensional modeling method) for forming the above-described three-dimensional model will be described.
FIG. 2 is a flowchart illustrating an example of a method for modeling a three-dimensional structure according to the present embodiment. FIG. 3 is a flowchart illustrating an example of a balance adjustment method applied to the three-dimensional data preparation process in the three-dimensional modeling method according to the present embodiment. FIG. 4 is a conceptual diagram for explaining a balance adjustment method applied to the three-dimensional data preparation process according to the present embodiment. Fig.4 (a) is a schematic plan view which shows the three-dimensional structure before setting the balance adjustment part which concerns on this embodiment, FIG.4 (b) is the setting method of the balance adjustment part which concerns on this embodiment. It is a schematic plan view which shows. FIG. 5 is a flowchart illustrating an example of a layered modeling process in the three-dimensional modeling method according to the present embodiment. 6 to 8 are schematic process diagrams showing the formation state of the base part and the three-dimensional modeled part in the layered modeling process according to the present embodiment. Here, in the additive manufacturing process, a case where the above-described powder lamination method is applied to form the base part and the three-dimensional object part will be described, but the present invention is not limited to this, and the above-described light It goes without saying that various additive manufacturing methods such as a forming method and a thin plate stacking method may be applied.

  As shown in FIG. 2, for example, the three-dimensional modeling method according to the present embodiment is roughly a three-dimensional data preparation step (S101), a hierarchical data generation step (S102), a layered modeling step (S103), and powder removal. And (S104). In the present embodiment, in the three-dimensional data preparation step, the center of gravity position of the entire three-dimensional structure is calculated based on the three-dimensional data of the three-dimensional structure including the three-dimensional structure 10A, 10B and the base 20 described above. The concave portion 22 provided with the balance adjusting portion 23 is formed on the lower surface side of the base portion 20 so that the three-dimensional structure can be self-supported when exhibited or displayed.

  First, in the three-dimensional data preparation step (S101), three-dimensional CAD data of a three-dimensional structure to be modeled is prepared in the layered modeling step (S103). The base portion 20 defined by the three-dimensional CAD data may have a concave portion 22 formed on the lower surface side in advance, or the concave portion 22 is not provided, and the upper surface and the lower surface are uniform and parallel. It may consist of a plane. Here, the three-dimensional data preparation step (S101) includes, for example, as shown in FIG. 3, a center-of-gravity position calculation step (S111), a balance determination step (S112), a balance adjustment step (S113), and three-dimensional data. And a correction step (S114).

  First, in the center-of-gravity position calculation step (S111), the center of gravity of the three-dimensional structure 10A, 10B and the base 20 of the three-dimensional structure is calculated based on the prepared three-dimensional CAD data. Here, the center of gravity of each part is calculated individually based on the extending direction and the protruding amount of each three-dimensional modeling part 10A, 10B from the base part 20, the thickness and area of the base part 20, and the like. Further, the calculated centroids are synthesized in consideration of the arrangement positions of the respective parts, and the centroid position of the entire three-dimensional structure is calculated.

  Next, in the balance determination step (S112), it is determined whether or not the calculated center of gravity is within an area where the three-dimensional structure can stand on its own. Specifically, as shown in FIG. 4A, when the three-dimensional structure is viewed in plan view from the upper surface side (surface side on which the three-dimensional structure 10A, 10B is formed) of the base 20, for example, the base It is determined whether or not the center of gravity position Pc exists in the area corresponding to 20, and if the center of gravity position Pc exists outside the area, the entire three-dimensional structure falls or tilts due to the bias of the center of gravity, or Then, it is determined that there is a possibility of lifting from the installation surface HL.

  Here, in the present embodiment, as a reference for determining the balance, the point of whether or not the center of gravity position Pc of the three-dimensional structure is present in the region corresponding to the base portion 20 is shown as an example. It is not limited to this. That is, whether or not the three-dimensional structure can be self-supported depends on the influence of various conditions such as the thickness and area of the base portion 20, the protruding shape and arrangement position of each three-dimensional structure 10A, 10B, and the weight of the three-dimensional structure. receive. That is, the center-of-gravity position Pc of the three-dimensional structure when the balance adjustment unit 23 is provided is closer to the center part of the three-dimensional structure when the balance adjustment unit 23 is provided with respect to the center of gravity position Pc of the three-dimensional structure when there is no balance adjustment unit 23 If the three-dimensional structure can be substantially self-supported by being set, the gravity center position Pc may not be located at the center of the three-dimensional structure.

  Next, in the balance adjustment step (S113), as shown in FIG. 4A, when the center of gravity Pc is outside the region corresponding to the base portion 20 and is unstable, that is, a three-dimensional structure. 4 cannot be self-supported, the balance adjusting unit 23 is provided so that the center of gravity position Pc enters (moves) within the region corresponding to the base 20 as shown in FIG. Here, as shown in FIG. 4A, when the recess 22 is provided in advance on the lower surface side of the base portion 20, the balance adjustment unit 23 is located in the recess 22 and is located at the position of the center of gravity. A thick portion having a predetermined planar spread (area or planar shape) and thickness is set in a region on the direction side in which Pc is moved (that is, the left side in FIG. 4B). FIG. 1A and FIG. 4B show a case where the balance adjusting portion 23 made of a thick portion having a rectangular planar shape is set in a substantially entire region on the left side of the concave portion 22 in the drawing.

  On the other hand, when the concave portion 22 is not provided on the lower surface side of the base portion 20, as shown in FIGS. 1 and 4B, the concave portion that is a thin portion in substantially the entire area excluding the peripheral edge portion 21 on the lower surface side. Further, a predetermined planar spread (area or planar shape) and thickness are set in a region on the direction side (left side in the drawing) within the concave portion 22 and in the direction of moving the center of gravity position Pc. The balance adjustment part 23 which consists of the thick part which has is set.

  As shown in FIG. 4B, the planar spread and thickness defining the shape of the balance adjusting unit 23 enter the center of gravity position Pc existing outside the region corresponding to the base 20 within the region. It is set to an appropriate numerical value for movement. As a result, the weight balance of the three-dimensional structure is adjusted from a state where the three-dimensional structure cannot stand to a state where it can stand. Further, by providing the balance adjusting unit 23 in the recess 22 on the lower surface side of the base portion 20, it may affect the appearance of the three-dimensional structure in which the three-dimensional modeling portions 10 </ b> A and 10 </ b> B are provided on the upper surface of the base portion 20. Absent. In addition, by setting the thickness of the balance adjusting portion 23 to be equal to or less than the depth of the concave portion 22, the base portion 20 does not float from the installation surface HL and contacts well.

  Thus, according to the center of gravity position Pc, the installation position, planar spread, and thickness of the balance adjusting unit 23 provided in the recess 22 on the lower surface side of the base portion 20 are set (that is, the center of gravity position is considered). ) The overall image of the three-dimensional structure is displayed on a monitor or the like, for example, as a three-dimensional stereoscopic image, or as a two-dimensional image including six surfaces of the upper, lower, left, and right surfaces, and the front and back surfaces. Thereby, the user can confirm the addition state of the balance adjustment unit 23 set by the above-described balance adjustment step.

  Next, in the three-dimensional data correction step (S114), the user confirms the three-dimensional or two-dimensional image displayed on the monitor or the like for the three-dimensional structure in which the balance adjustment unit 23 is set by the balance adjustment step described above. Thus, it is determined whether or not the three-dimensional structure can be corrected. Then, when the user gives an instruction to approve the correction, the original three-dimensional CAD data is corrected so as to correspond to the three-dimensional structure to which the balance adjusting unit is added.

  In the three-dimensional data preparation step (S101), a powder material constituting the three-dimensional structure and a binder (binder) for bonding and curing the powder material are prepared. In the three-dimensional modeling method using the powder laminating method according to the present embodiment, it is possible to apply gypsum such as α gypsum and resin powder such as starch, polypropylene, polycarbonate, polyethylene terephthalate, nylon as the powder material, The binder may contain a catalyst for allowing the powder material itself to undergo a curing reaction. In this case, a sulfate is preferable when the powder material is gypsum. The binder may be a resin adhesive. Here, the bonding includes at least one of chemical bonding and physical bonding.

  Next, in the hierarchical data generation step (S102), the upper surface of the modeling stage when forming the three-dimensional structure is based on the three-dimensional CAD data corrected in the three-dimensional data preparation step (S101) described above. As described above, the cross-sectional shape data of each layer that has been cut into circles is generated when the three-dimensional structure is cut into a plurality of layers in a plane parallel to the reference plane.

  Next, as shown in FIG. 5, for example, the additive manufacturing process (S103) includes a powder material layer forming step (S211), a combined body forming step (S212), and a combined body stacking step (S213). Yes.

  First, in the powder material layer forming step (S211), as shown in FIG. 6A, the powder material is spread thinly and uniformly on the upper surface of the modeling stage 110 of the three-dimensional modeling apparatus, and one layer (that is, A powder material layer 11-1 of the first layer) is formed. Here, the thickness of the powder material layer 11-1 for one layer is set to about 0.1 mm or more, for example.

  Next, in the combined body formation step (S212), the powder material layer 11-1 is selectively hardened based on the cross-sectional shape data of each layer generated from the corrected three-dimensional CAD data, and the layer A combined body corresponding to the cross-sectional shape of the three-dimensional structure is formed. Specifically, as shown in FIG. 6B, based on the cross-sectional shape data of the first layer, which is the first layer from the reference surface side, with the upper surface of the modeling stage 110 as the reference surface in the cross-sectional shape data. Then, while scanning the binder discharge unit 120, the binder 121 is discharged from the binder discharge unit 120 into the region corresponding to the cross-sectional shape data of the first level powder material layer 11-1. That is, the cross-sectional shape of the first layer of the three-dimensional structure is drawn with the dropped binder 121 on the powder material layer 11-1. The binder discharge unit 120 includes a discharge mechanism equivalent to a printer head used in an ink jet printer.

  Then, as the binder 121 is cured, as shown in FIG. 6C, the powder material of the powder material layer 11-1 in the region into which the binder 121 has penetrated is bonded and cured, so that the third of the three-dimensional structure is obtained. A combined body 21-1 corresponding to the cross-sectional shape of one layer is formed. The combined body 21-1 of the first layer of the three-dimensional structure formed here corresponds to, for example, the lowermost layer (first layer) of the peripheral edge 21 of the base part 20 of the three-dimensional structure illustrated in FIG. 1. .

  Next, in the bonded body stacking step (S213), the above-described powder material layer forming step (S211) and combined body forming step (S212) are repeated to stack the bonded bodies formed in the powder material layers of the respective layers. To form a three-dimensional structure. Specifically, as shown in FIG. 6D, the powder material is spread thinly and uniformly on the upper surface of the first level powder material layer 11-1 on the modeling stage 110, and the second level powder material. Layer 11-2 is formed.

  Next, as shown in FIG. 6E, the second part of the cross-sectional shape data is scanned while the binder discharge section 120 is scanned based on the cross-sectional shape data of the second layer that is the second layer from the reference plane side. The binder 121 is discharged and infiltrated into a region corresponding to the cross-sectional shape data of the powder material layer 11-2 in the hierarchy. When the binder 121 is cured, as shown in FIG. 7A, the powder material of the powder material layer 11-2 in the region into which the binder 121 has penetrated is bonded and cured, and the second layer of the three-dimensional structure is formed. Combined bodies 21-2 and 23-2 corresponding to the cross-sectional shape are formed. The combined body 21-2 of the second layer of the three-dimensional structure formed here corresponds to the second layer of the peripheral edge portion 21 of the base portion 20 shown in FIG. This corresponds to the lowermost layer (first layer) of the balance adjusting unit 23 of the base 20 shown in FIG.

  At this time, when the modeling stage 110 is viewed in plan from the top of the drawing, the powder material in the second layer formed in a region that overlaps with the combined body 21-1 formed in the powder material layer 11-1 in the first layer. The bonded body 21-2 of the layer 11-2 is cured in a state where the dropped binder 121 reaches the combined body 21-1 at the first level and is bonded to the combined body 21-1 at the first level. To do. That is, in the region where the lower layer conjugate and the upper layer conjugate are formed so as to overlap in a planar manner, the upper layer and the lower layer conjugate are formed as a unitary conjugate.

  By repeating such a combined body stacking step (S213), for example, as shown in FIGS. 7B and 7C, the first layer to the top layer (in the figure, the base 20 of the three-dimensional structure). Based on the cross-sectional shape data up to (fourth layer), in the powder material layers 11-1 to 11-4, the bonds 21-1 to 21-3 constituting the peripheral edge 21 and the bonds constituting the balance adjusting part 23 The base portion 20 including the bodies 23-2 to 23-3 and the combined body 21-4 constituting the upper surface portion is integrally laminated. At this time, the space surrounded by the combined bodies 21-1 to 21-3 constituting the peripheral edge portion 21 and the combined body 21-4 constituting the upper surface portion constitutes the concave portion 22 provided on the lower surface side of the base portion 20. .

  Furthermore, by repeating the same combination stacking step (S213) as described above, for example, as shown in FIGS. 7D to 8B, the first layer of the three-dimensional structure 10A, 10B of the three-dimensional structure is obtained. Based on the cross-sectional shape data from the uppermost layer to the uppermost layer, the combined materials 10A-1 to 10A-E and the three-dimensional structure 10B constituting the three-dimensional structure 10A are configured in the powder material layers 11-5 to 11-E. The combined bodies 10 </ b> B- 1 to 10 </ b> B-E are integrally laminated on the upper surface of the base portion 20.

  In this way, by each step of the layered modeling process (S103), as shown in FIG. 8B, the three-dimensional modeled portion is formed by the hardened powder material 101 in the powder material 101 laminated on the modeling stage 110. A three-dimensional structure composed of 10A, 10B and the base 20 is formed. At this time, the formed three-dimensional structure is formed in a state of being embedded in the powder material 101 composed of the powder material layers 11-1 to 11-E stacked on the modeling stage 110, and is uncured around. Since the powder material 101 is filled and supported, even if the center of gravity of the three-dimensional structure is deviated or there is an overhang portion, falling or damage is prevented.

  Next, in the powder removal / removal step (S104), the uncured powder material 101 laminated on the modeling stage 110 is removed, and the exposed three-dimensional structure is taken out. Specifically, as shown in FIG. 8C, for example, the powder material 101 is sucked and discharged from a powder discharge port (not shown) provided in the modeling stage 110, and the powder material is discharged from above the modeling stage 110. After all 101 is removed, or while removing the powder material 101 from the modeling stage 110, the exposed three-dimensional modeled object is taken out from the modeling stage 110.

  In the present embodiment, as a method of removing the powder material 101 on the modeling stage 110, the case where the powder material 101 is discharged through the powder discharge port provided in the modeling stage 110 has been described. However, the present invention is not limited to this. For example, the powder material 101 may be blown off by wind pressure or removed by sound wave vibration.

According to the three-dimensional structure and the three-dimensional structure method described above, the following effects can be obtained.
FIG. 9 is a schematic configuration diagram illustrating a first comparative example for explaining the operational effects of the three-dimensional structure and the three-dimensional structure method according to the present embodiment. FIG. 9A is a perspective view showing a first comparison target example, and FIG. 9B is a conceptual diagram for explaining the center-of-gravity position in the first comparison target example. IXC-IXC line in the three-dimensional structure shown in FIG. 9A (in this specification, “IX” is conveniently used as a symbol corresponding to the Roman numeral “9” shown in FIG. 9A). Is a schematic cross-sectional view showing a cross-sectional structure along the line. Here, in order to simplify the description, the same components as those in the present embodiment will be described with the same reference numerals.

  For example, as shown in FIG. 9A, in the three-dimensional structure (first comparative example) having the same appearance as the above-described embodiment, no recess is provided on the lower surface side of the base portion 20P. A case where the upper surface and the lower surface are formed of a uniform parallel plane, or a case where only the concave portion 22 is provided on the lower surface side of the base portion 20 as shown in FIG. In this case, the center-of-gravity position Pc when the three-dimensional structure is viewed in plan from the upper surface side of the base parts 20 and 20P corresponds to the base parts 20 and 20P as shown in FIGS. 4 (a) and 9 (b). 9C, there is a possibility that the three-dimensional structure falls down or tilts due to the deviation of the center of gravity, or the base 20P is lifted from the installation surface HL, as shown in FIG. 9C. There is sex.

  On the other hand, in this embodiment, as shown in FIG. 1, the balance adjustment part 23 which consists of a thick part is provided in the recessed part 22 provided in the lower surface side of the base part 20 of a three-dimensional structure. As shown in FIG. 4B, the center-of-gravity position Pc of the entire three-dimensional structure can be moved so as to fall within the region corresponding to the base portion 20, thereby canceling or reducing the bias of the center of gravity. it can. Therefore, it is possible to easily realize a desired display state by suppressing the fall or inclination of the three-dimensional structure and the lifting from the installation surface HL. Moreover, at this time, it is only necessary to perform the process of correcting the 3D CAD data so as to add the balance adjusting unit 23 in the 3D modeling method without changing the appearance of the 3D modeled object. It has the feature that it does not require any changes to the additive manufacturing process.

  FIG. 10 is a conceptual configuration diagram illustrating another configuration example of the three-dimensional structure according to the present embodiment. FIG. 10A is a perspective view showing a schematic configuration of a three-dimensional structure according to this configuration example, and FIG. 10B is a conceptual diagram for explaining a balance adjustment method in this configuration example. FIG. 10C is an XC-XC line in the three-dimensional structure shown in FIG. 10A (in this specification, as a symbol corresponding to the Roman numeral “10” shown in FIG. 10A). 2 is a schematic cross-sectional view showing a cross-sectional structure along the line “X”. Here, components equivalent to those in the first embodiment described above (see FIGS. 1 and 4) will be described with the same reference numerals.

  In the first embodiment described above (see FIG. 1), as shown in FIG. 4B, the center of gravity position Pc of the entire three-dimensional structure is moved so as to fall within the region corresponding to the base portion 20. For this reason, as shown in FIG. 1 and FIG. 4B, the case where the balance adjusting portion 23 made of a thick portion is provided in the concave portion 22 provided on the lower surface side of the base portion 20 has been described. The invention is not limited to this. That is, the present invention only needs to move the center-of-gravity position Pc of the entire three-dimensional structure into an area corresponding to the base part 20, and for example, as shown in FIG. A recess 22 having a predetermined planar spread (planar shape) and depth is provided on the lower surface side of the base portion 20 on the side where there is (a right side in the drawing), and a peripheral edge portion 21 in contact with the installation surface HL; The balance adjustment part 23 in which the protruding height is equal may be provided. Here, the concave portion 22 is a thin portion compared to the thickness of the other region of the base portion 20. Even in this case, the center of gravity position Pc of the entire three-dimensional structure can be moved so as to fall within the region corresponding to the base portion 20, so that the deviation of the center of gravity can be offset or reduced. It is possible to easily realize a desired display state by suppressing the falling or tilting of the object and the lifting from the installation surface HL. Moreover, the contact area with the installation surface HL becomes larger and more stable because the balance adjusting unit 23 comes into contact with the installation surface HL.

<Second Embodiment>
Next, a second embodiment of the three-dimensional structure according to the present invention will be described.
In 1st Embodiment mentioned above, it installed so that the lower surface side of the base part 20 might contact | connect the installation surface HL which consists of a horizontal surface, and demonstrated the case where a three-dimensional molded item was displayed or displayed. The three-dimensional structure according to the second embodiment has a configuration that is displayed or posted on a vertical surface such as a wall surface.

  FIG. 11 is a schematic configuration diagram showing a second embodiment of the three-dimensional structure according to the present invention. Fig.11 (a) is a perspective view which shows the display state of the three-dimensional structure based on this embodiment, FIG.11 (b) is a perspective view which shows schematic structure of the three-dimensional structure based on this embodiment. FIG. 11 (c) shows the XIC-XIC line in the three-dimensional structure shown in FIG. 11 (b) (in this specification, the symbol corresponding to the Roman numeral “11” shown in FIG. 11 (b)). For convenience, “XI” is used for the sake of convenience.). FIG. 12 is a conceptual diagram for explaining a balance adjustment method in the three-dimensional structure according to the present embodiment. FIG. 12A is a schematic plan view showing a three-dimensional structure before setting the balance adjustment unit according to this embodiment, and FIG. 12B is a setting method of the balance adjustment unit according to this embodiment. It is a schematic plan view which shows. In addition, about the structure equivalent to 1st Embodiment mentioned above, the same code | symbol is attached | subjected and demonstrated.

  In the second embodiment of the three-dimensional structure according to the present invention, as shown in FIG. 11 (a), the three-dimensional structure is incorporated in a frame 30 or a frame (framed), a wall surface or the like. Will be displayed or posted on the vertical plane. Here, as shown in FIGS. 11 (b) and 11 (c), the three-dimensional structure is relief (relieved) in an arbitrary region on the upper surface side (one surface side) of the base portion 20 having a rectangular flat plate structure. The three-dimensional modeling parts 10C and 10D having a protruding shape are provided apart from each other. Further, the three-dimensional modeling parts 10 </ b> C and 10 </ b> D are integrally formed of the same material as the base part 20.

  Specifically, as illustrated in FIGS. 11B and 11C, the three-dimensional modeling unit 10 </ b> C has, for example, a protruding amount (volume, protruding size, or shape) from the upper surface of the base portion 20 compared to the three-dimensional modeling unit 10 </ b> D. On the other hand, in the three-dimensional modeled portion 10D, for example, the protruding amount from the upper surface of the base portion 20 is smaller than that of the three-dimensional modeled portion 10C. That is, these three-dimensional model | molding parts 10C and 10D have the shape where the balance of weight is not taken and the bias | inclination of a gravity center is large.

  Further, as shown in FIGS. 11B and 11C, the base portion 20 is thin on substantially the entire surface except the peripheral portion 21 of the base portion 20 on the lower surface side, as in the first embodiment described above. A concave portion 22 serving as a portion is provided, and a balance adjusting portion 23 including a thick portion is provided in the concave portion 22. The balance adjusting unit 23 is formed simultaneously and integrally with the same material as the base unit 20 and the three-dimensional modeling units 10C and 10D, and the deviation of the center of gravity due to the difference in the protruding amount of the three-dimensional modeling units 10C and 10D. The installation position, planar spread (area or planar shape), thickness, etc. are set so as to cancel or reduce.

  And such a three-dimensional structure according to the present embodiment is formed using the same three-dimensional structure forming method as in the first embodiment described above. In particular, in the present embodiment, the following balance determination step (S112) and balance adjustment step (S113) are executed in the three-dimensional data preparation step (S101).

  First, in the balance determination step (S112), the center of gravity position of the entire three-dimensional structure calculated based on the three-dimensional CAD data of the three-dimensional structure to be modeled includes the three-dimensional structure. When suspended from a vertical surface such as a wall surface, the upper side or the lower side of the frame 30 (or the base 20 having a rectangular shape) is substantially horizontal and is in a position or range that can be displayed without tilting. Determine whether or not.

  Specifically, as shown in FIG. 12A, first, when a three-dimensional structure is viewed in plan from the upper surface side of the base portion 20 (the surface side on which the three-dimensional structure portions 10C and 10D are formed), a rectangular shape is obtained. A suspension point Pf that is orthogonal to the upper side or the lower side of the base portion 20 having a shape (rectangular shape) and that suspends the frame 30 incorporating the three-dimensional structure on the installation surface VL such as a wall surface is provided. It is determined whether or not the center-of-gravity position Pc exists on the passing reference line CL (or in the vicinity thereof). When the center-of-gravity position Pc exists at a position separated from the reference line CL (or the vicinity of the reference line CL), the weights on the left and right sides of the reference line CL are imbalanced and are framed due to the deviation of the center of gravity. In addition, it is determined that there is a possibility that the entire three-dimensional structure is tilted or lifts from the installation surface VL formed of a vertical surface. Here, when the frame 30 incorporating the three-dimensional structure is suspended from the installation surface VL such as a wall surface, the upper side or the lower side of the rectangular base portion 20 (or the frame 30) is in the horizontal direction (in other words, left and right The reference line CL corresponds to a vertical line passing through the suspension point Pf (in other words, a line in the direction of gravity).

  When the frame 30 incorporating the three-dimensional structure having the rectangular base 20 is suspended from the installation surface VL such as a wall surface by one hanging point Pf, the hanging point Pf is generally 30 or the center line of the base part 20 in the horizontal direction (the left-right direction in the drawing), and the relation of reference line CL = center line is established. In addition, when the frame 30 is suspended from the installation surface by a plurality of suspension points (for example, two points), for example, the reference line passing through each suspension point is defined in the same manner as described above. Of these, it is determined whether or not the center of gravity position Pc exists in the region between the reference lines that are the most distant from each other, and if the center of gravity position Pc is outside the region between the reference lines, the framed three-dimensional It is determined that there is a possibility that the entire model is tilted or lifted from the installation surface VL.

  Here, in the present embodiment, as a reference for determining the balance, the center of gravity position Pc of the three-dimensional structure is on the reference line CL (or its immediate vicinity) passing through the suspension point Pf of the frame 30 or the reference line. Although the point whether it exists in the area | region between them was shown as an example, this invention is not limited to this. That is, whether or not the framed three-dimensional structure can be displayed without being tilted or floating from the installation surface VL depends on the protruding shape and arrangement position of each three-dimensional structure 10C, 10D, and the weight of the three-dimensional structure. It is influenced by various conditions such as the position of the suspension point Pf of the frame 30 in which the three-dimensional structure is incorporated and the frictional resistance between the back surface of the frame 30 in contact with the installation surface VL and the installation surface VL. Therefore, if the framed three-dimensional structure can be displayed without substantially tilting or floating, the center of gravity position Pc is on the reference line CL (or in the vicinity of the reference line CL) or in the region between the reference lines. May not be present.

  Next, in the balance adjustment step (S113), as shown in FIG. 12A, when the center of gravity position Pc is present at a position separated from the reference line CL (or the vicinity thereof), that is, framed. When the three-dimensional structure is tilted or is lifted from the installation surface VL, as shown in FIG. 12B, the center-of-gravity position Pc is located on (or moves to) the reference line CL. ) Is provided as shown in FIG. Here, as in the first embodiment described above, the balance adjusting unit 23 is provided with a recess 22 provided in advance on the lower surface side of the base 20 as shown in FIG. A predetermined planar spread (area or planar shape) and thickness are provided in a region within the recess 22 and on the direction side in which the gravity center position Pc is moved (that is, the left side in FIG. 12B). Set the thick part. 11 (b), 11 (c), and 12 (b), when the balance adjusting unit 23 made of a thick portion having a rectangular planar shape is set in the substantially entire region on the left side of the recess 22 in the drawing. Indicates.

  On the other hand, when the concave portion 22 is not provided on the lower surface side of the base portion 20, as shown in FIGS. 11 and 12B, the concave portion that is a thin portion in substantially the entire area excluding the peripheral edge portion 21 on the lower surface side. Further, a predetermined planar spread (area or planar shape) and thickness are set in a region on the direction side (left side in the drawing) within the concave portion 22 and in the direction of moving the center of gravity position Pc. The balance adjustment part 23 which consists of the thick part which has is set.

  As shown in FIG. 12B, the planar spread and thickness that defines the shape of the balance adjusting unit 23 are the center-of-gravity position Pc existing at a position away from the reference line CL (or the vicinity thereof). Therefore, the value is set to an appropriate numerical value so as to move on the reference line CL (or in the vicinity of the reference line CL). As a result, the weight balance is adjusted from a state where the three-dimensional structure is tilted or lifted when suspended to a state where the three-dimensional structure remains horizontal and does not lift. Further, by providing the balance adjusting unit 23 in the concave portion 22 on the lower surface side of the base portion 20, it may affect the appearance of the three-dimensional structure in which the three-dimensional modeling portions 10 </ b> C and 10 </ b> D are provided on the upper surface of the base portion 20. Absent. Further, by setting the thickness of the balance adjusting portion 23 to be equal to or less than the depth of the concave portion 22, the base portion 20 is favorably incorporated into the frame 30.

And in this embodiment, the following effects are obtained.
FIG. 13 is a schematic configuration diagram illustrating a second comparison target example for explaining the operational effect of the three-dimensional structure according to the present embodiment. FIG. 13A is a perspective view showing a second comparison target example, and FIG. 13B is a conceptual diagram for explaining the position of the center of gravity in the second comparison target example. ) Is the XIIIC-XIIIC line in the three-dimensional structure shown in FIG. 13A (in this specification, for convenience, “XIII” is a symbol corresponding to the Roman numeral “13” shown in FIG. 13A). Is a schematic cross-sectional view showing a cross-sectional structure along the line. FIG. 14 is a conceptual diagram for explaining the position of the center of gravity and the display state in the second comparative example. Here, in order to simplify the description, the same components as those in the present embodiment will be described with the same reference numerals.

  For example, as shown in FIG. 13A, in the three-dimensional structure (second comparative example) having the same appearance as the above-described embodiment, no recess is provided on the lower surface side of the base portion 20P. A case where the upper surface and the lower surface are formed of a uniform parallel plane, or a case where only the concave portion 22 is provided on the lower surface side of the base portion 20 as shown in FIG. In this case, the center-of-gravity position Pc when the three-dimensional structure is viewed in plan from the upper surface side of the base portions 20 and 20P is the reference line CL (or its center) as shown in FIGS. 12 (a) and 13 (b). 14, the framed three-dimensional structure cannot be kept horizontal due to the bias of the center of gravity, or is tilted or lifted from the installation surface VL such as a wall surface. Problems can arise.

  On the other hand, in this embodiment, as shown in FIG. 11, the balance adjustment part 23 which consists of a thick part is provided in the recessed part 22 provided in the lower surface side of the base part 20 of a three-dimensional structure. As shown in FIG. 12B, the center-of-gravity position Pc of the entire three-dimensional structure is moved so as to be positioned on the reference line CL (or its pole vicinity), thereby canceling or reducing the center-of-gravity deviation. can do. Accordingly, even when the framed three-dimensional structure is displayed or displayed on the installation surface VL such as a wall surface by being suspended at the suspension point Pf on the reference line CL, the horizontal of the frame 30 is maintained. In addition, it is possible to easily achieve a desired display state by suppressing inclination and lifting from the installation surface VL. At this time, the appearance of the three-dimensional structure is not changed, and only the process of correcting the three-dimensional CAD data is performed in the three-dimensional modeling method, and the change of the additive manufacturing process is not required. It has the feature.

  Also in this embodiment, as shown in the other configuration example of the first embodiment described above, the center of gravity position Pc is on the reference line CL (or in the vicinity thereof) on the lower surface side of the base portion. Only the concave portion 22 for balance adjustment for movement may be provided on the side where the center of gravity position Pc exists (the right side in the drawing).

<Third Embodiment>
Next, a third embodiment of the three-dimensional modeling method according to the present invention will be described.
In the first and second embodiments described above, as shown in FIGS. 1 and 11, a recess is provided on the lower surface side of the base portion of the three-dimensional structure, and a balance adjustment unit including a thick portion therein. In the above description, a configuration in which only the concave portion for balance adjustment is provided on the lower surface side has been described. In 3rd Embodiment, it has the structure which provided the hollow part for balance adjustment inside the solid modeling part provided in the upper surface side of a base part.

  FIG. 15 is a schematic configuration diagram showing a third embodiment of the three-dimensional modeling method according to the present invention. Fig.15 (a) is a perspective view which shows schematic structure of the three-dimensional structure based on this embodiment, FIG.15 (b) is the XVB-XVB line | wire (3V in the three-dimensional structure shown to Fig.15 (a) ( In this specification, “XV” is used as a symbol corresponding to the Roman numeral “15” shown in FIG. 15A for the sake of convenience.) FIG. FIG. 16 is a conceptual diagram for explaining a balance adjustment method in the three-dimensional structure according to the present embodiment. In addition, about the structure equivalent to 1st Embodiment mentioned above, the same code | symbol is attached | subjected and demonstrated.

  As shown in FIG. 15A, the third embodiment of the three-dimensional structure according to the present invention has the same appearance as the first embodiment described above. For example, FIGS. ), The hollow portion 24 is provided inside the three-dimensional structure 10A among the three-dimensional structures 10A and 10B provided on the upper surface side (one surface side) of the base portion 20 having a rectangular flat plate structure. ing. Here, the three-dimensional modeled portion 10A has a larger amount of protrusion (volume, protruding dimensions and shape) from the upper surface of the base portion 20 than the three-dimensional modeled portion 10B.

  Further, the base portion 20 is provided with a concave communication portion 25 that connects the hollow portion 24 of the three-dimensional structure 10A provided on the upper surface side and the lower surface side of the base portion 20. That is, as shown in FIG. 15B, the hollow portion 24 of the three-dimensional structure 10 </ b> A is opened to the lower surface side of the base portion 20 via the communication portion 25. Here, the hollow portion 24 and the balance adjusting portion 23 are installed so as to cancel or reduce the bias of the center of gravity due to the difference in the protruding amount of the three-dimensionally shaped portions 10A and 10B, as in the above-described embodiments. And shape (volume and cross-sectional shape) are set.

  And such a three-dimensional structure according to the present embodiment is formed using the same three-dimensional structure forming method as in the first embodiment described above. In particular, in the present embodiment, the following balance adjustment step (S113) is executed in the three-dimensional data preparation step (S101).

  First, in the balance determination step (S112), the center of gravity position of the entire three-dimensional structure calculated based on the three-dimensional CAD data is within the region corresponding to the base portion 20, as in the first embodiment described above. If the position of the center of gravity exists outside the region, there is a possibility that the entire three-dimensional structure may fall down or lift from the installation surface HL due to the deviation of the center of gravity. to decide.

  Next, in the balance adjustment step (S113), as shown in FIG. 16, when the center of gravity position Pc is outside the region corresponding to the base portion 20, as shown in FIGS. 15 (a) and 15 (b). In addition, the hollow portion 24 is provided inside the three-dimensional structure 10 </ b> A so that the center of gravity Pc enters (moves) the region corresponding to the base portion 20. Here, the hollow portion 24 is set so as to have a predetermined shape and volume inside the three-dimensional modeled portion 10 </ b> A, leaving a predetermined thickness along the extending direction of the three-dimensional modeled unit 10 </ b> A. Further, when the hollow portion 24 forms a three-dimensional structure using the powder lamination method in the layered modeling process, the base portion is used to discharge the powder material in the hollow portion 24 in the powder removal / removal step. The hollow part 24 and the lower surface side of the base part 20 are communicated with each other by a communication part 25 provided in the base 20. The hollow part 24 is formed simultaneously and integrally with the three-dimensional modeled parts 10A and 10B in the layered modeling process (S103) described above, and the communicating part 25 is formed simultaneously and integrally with the base part 20.

  As shown in FIG. 16, the extending direction, thickness, and volume that define the shape of the hollow portion 24 are set so that the center of gravity position Pc existing outside the region corresponding to the base portion 20 enters the region. Set to an appropriate value to move. As a result, the weight balance of the three-dimensional structure is adjusted from a state where the three-dimensional structure cannot stand to a state where it can stand.

  Thus, in this embodiment, as shown in FIG. 15, among the three-dimensional structure provided in the three-dimensional structure, the three-dimensional structure having a shape in which the protruding amount is large and the weight balance is unbalanced. The hollow portion 24 is provided inside the portion 10A, and the center of gravity Pc of the entire three-dimensional structure is moved so as to fall within the region corresponding to the base portion 20 as shown in FIG. Can be offset or reduced. Therefore, similarly to the first embodiment described above, it is possible to easily achieve a desired display state by suppressing the falling or inclination of the three-dimensional structure and the lifting from the installation surface HL. At this time, the appearance of the three-dimensional structure is not changed, and only the process of correcting the three-dimensional CAD data is performed in the three-dimensional modeling method, and the change of the additive manufacturing process is not required. It has the feature.

  In addition, in this embodiment, although the case where the structure which concerns on this embodiment was applied to the three-dimensional structure shown in 1st Embodiment mentioned above was demonstrated, this invention is not limited to this. It may be applied to the three-dimensional structure shown in the second embodiment described above. Further, in addition to the hollow portion 24 shown in the present embodiment, the concave portion 22 and the balance adjusting portion 23 shown in the first and second embodiments described above may be further provided on the lower surface side of the base portion 20. Good.

(3D modeling equipment)
Next, a 3D modeling apparatus capable of realizing the 3D modeling method as described above will be briefly described. Here, a three-dimensional modeling apparatus corresponding to the powder lamination method applied to the above-described three-dimensional modeling method is shown.

  FIG. 17 is a schematic configuration diagram illustrating an example of a three-dimensional modeling apparatus capable of realizing the three-dimensional modeling method according to the present invention. Here, components equivalent to those in the above-described embodiments will be described with the same reference numerals.

  The three-dimensional data preparation process (S101), the hierarchical data generation process (S102), the layered modeling process (S103), and the powder removal / removal process (S104) shown in the above-described three-dimensional modeling method (see FIG. 2) The three-dimensional modeling apparatus 100 as shown in FIG.

  For example, as shown in FIG. 17, the three-dimensional modeling apparatus 100 schematically includes a modeling stage 110, a binder discharge unit 120, a scanning mechanism unit 130, a powder material supply unit 140, a control unit 150, and a data processing unit 160. And have.

  The modeling stage 110 has an upper surface serving as a reference surface when forming a three-dimensional modeled object in the series of three-dimensional modeling methods described above, and a powder material is formed on the upper surface by executing the layered modeling process (S103). The layers are sequentially stacked, and a three-dimensional structure (three-dimensional structure 10A, 10B and base 20) based on the corrected three-dimensional CAD data is formed in the powder material layer. In addition, the modeling stage 110 includes an elevating mechanism (not shown), for example, so that the height of the upper surface of each powder material layer formed on the upper surface of the modeling stage 110 is always constant. The position in the direction (Z direction) is controlled.

  The binder discharge unit 120 includes a discharge mechanism that discharges the binder as minute droplets, similarly to a printer head used in an ink jet printer. In the combined body formation step (SS212) of the layered modeling process (S103), the binder discharge unit 120 is moved along the guide rail 131 in a plane (XY plane) parallel to the upper surface of the modeling stage 110 by the scanning mechanism unit 130. Move. Thereby, a binder is discharged to the area | region corresponding to the hierarchical data of the three-dimensional modeling thing (three-dimensional modeling part 10A, 10B and the base part 20) of the powder material layer of each hierarchy formed in the upper surface of the modeling stage 110. Harden.

  The powder material supply unit 140 stores the powder material, and in the powder material layer forming step (S211) of the layered modeling process (S103), the powder material is thinly and uniformly spread on the upper surface of the modeling stage 110 to have a predetermined thickness. One layer of powder material is formed.

  The control unit 150 controls at least each operation in the modeling stage 110, the binder discharge unit 120, the scanning mechanism unit 130, and the powder material supply unit 140. Specifically, in the layered modeling process (S103), based on the hierarchical data of the three-dimensional structure supplied from the data processing unit 160, the modeling stage 110, the binder discharge unit 120, the scanning mechanism unit 130, and the powder material supply unit By controlling each operation of 140, a three-dimensional structure (three-dimensional structure 10A, 10B and base 20) based on the three-dimensional CAD data is formed in the powder material 101 laminated on the modeling stage 110. . In the powder removal step (S104), the uncured powder material 101 laminated on the modeling stage 110 is discharged and removed, and the formed three-dimensional model is exposed.

  The data processing unit 160 includes an arithmetic device such as a computer, for example, and in the three-dimensional data preparation step (S101), based on the three-dimensional CAD data of the three-dimensional structure to be modeled, the above-described center-of-gravity position calculating step ( A series of processes including S111), a balance determination step (S112), a balance adjustment step (S113), and a three-dimensional data correction step (S114) are executed. These processes are executed by a program incorporated in the data processing unit 160. As a result, the center of gravity position of the entire three-dimensional structure is calculated, and the balance adjustment unit is set so that the imbalance of the weight balance caused by the shift of the center of gravity position from the center of the three-dimensional structure is improved. The Then, the three-dimensional CAD data is corrected according to the set contents.

  Further, the data processing unit 160 uses the hierarchical data generation step (S102) to generate hierarchical data when the three-dimensional structure is cut (divided) into a plurality of layers based on the corrected three-dimensional CAD data. Is generated. The hierarchical data of the three-dimensional structure (three-dimensional structure 10A, 10B and base 20) generated in this way is sent to the controller 150 and used in the additive manufacturing process (S103).

  In the three-dimensional modeling apparatus 100 having such a configuration, by executing the three-dimensional modeling method shown in the first to third embodiments described above, in the powder material 101 laminated on the modeling stage 110, A three-dimensional structure formed of the three-dimensional structure 10A, 10B (or 10C, 10D) and the base 20 is formed.

  As a result, the position of the center of gravity of the entire three-dimensional structure can be adjusted to offset or reduce the bias of the center of gravity, so that when the three-dimensional structure is displayed or displayed, it falls over, tilts, or rises from the installation surface. It is possible to easily achieve a desired display state.

  In each of the above-described embodiments, in the additive manufacturing process (S103) using the powder stacking method, based on the hierarchical data of the three-dimensional structure, a binder is discharged and cured on the powder material of each layer. The case where a three-dimensional structure (three-dimensional model | molding part 10A, 10B and the base part 20) is laminated and formed was demonstrated by repeating a process. The present invention is not limited to this. For example, by using a photocurable resin powder as a powder material, a region corresponding to the hierarchical data of a three-dimensional structure is irradiated with laser light having a predetermined wavelength. The step of selectively sintering and curing the photocurable resin powder may be repeated to laminate and form the three-dimensional modeled portion and the base portion.

As mentioned above, although some embodiment of this invention was described, this invention is not limited to embodiment mentioned above, It includes the invention described in the claim, and its equivalent range.
Hereinafter, the invention described in the scope of claims of the present application will be appended.

(Appendix)
The invention described in claim 1
In 3D objects,
One side is a flat base, and
A three-dimensional structure formed integrally with the same material as the base on the one surface side of the base,
A balance adjusting portion provided on the other surface side of the base portion which is the installation surface side;
Have
The balance adjusting unit is configured such that the position of the center of gravity of the three-dimensional structure when the three-dimensional structure is viewed in plan from the one surface side of the base is compared with the case where the balance adjusting unit is not provided. It is a three-dimensional structure that is set so as to approach the center of the base.

The invention described in claim 2
The three-dimensional structure according to claim 1, wherein a peripheral portion is provided on the other surface side of the base portion, and the balance adjusting portion does not protrude from the peripheral portion with respect to the installation surface. is there.

The invention according to claim 3
3. The three-dimensional structure according to claim 1, wherein the balance adjusting portion is provided in a recess provided on the other surface side of the base portion.

The invention according to claim 4
When the three-dimensional structure is not provided with the balance adjustment unit, the position of the center of gravity of the three-dimensional structure when the three-dimensional structure is viewed in plan from the one surface side of the base portion is When the balance adjusting part is provided without being positioned on a vertical line passing through a suspension point when the three-dimensional structure is suspended from the installation surface, the three-dimensional structure is formed from the one surface side of the base portion. The balance adjusting unit is positioned so that the position of the center of gravity of the three-dimensional structure when the object is viewed in plan is located on a vertical line passing through a suspension point when the three-dimensional structure is suspended from the installation surface. The three-dimensional structure according to any one of claims 1 to 3, wherein the three-dimensional structure is set.

The invention described in claim 5
The three-dimensional structure is a three-dimensional structure according to any one of claims 1 to 3, wherein a hollow portion is provided inside.

The invention described in claim 6
In the 3D modeling method,
The one surface side forms a flat plate-like base portion, and the three-dimensional modeling portion of the same material as the base portion on the one surface side of the base portion,
On the other surface side of the base portion that is the installation surface side, a position of the center of gravity of the three-dimensional structure when the three-dimensional structure is viewed in plan from the one surface side of the base portion is provided with a balance adjustment unit. The three-dimensional modeling method is characterized in that the balance adjusting portion is formed so as to be closer to the center portion of the base portion than in the case where the base portion is not.

The invention described in claim 7
When the balance adjusting unit is not provided, the position of the center of gravity of the three-dimensional structure when the three-dimensional structure is viewed in plan from the one surface side of the base portion is the installation position of the three-dimensional structure. When the three-dimensional structure is viewed in plan from the one surface side of the base portion when the balance adjustment portion is provided without being positioned on the vertical line passing through the suspension point when hanging on the surface. The balance adjusting unit is formed so that the position of the center of gravity of the three-dimensional structure is located on a vertical line passing through a suspension point when the three-dimensional structure is suspended from the installation surface. The three-dimensional modeling method according to claim 6.

10A to 10D 3D modeling part 11-1 to 11-E Powder material layer 20 Base part 21 Peripheral part 22 Recess 23 Balance adjustment part 24 Hollow part 25 Communication part 30 Frame 100 Three-dimensional modeling apparatus 101 Powder material 110 Modeling stage 120 Binder discharge Part 130 Scanning mechanism part 140 Powder material supply part 150 Control part 160 Data processing part HL, VL Installation surface Pc Center of gravity Pf Hanging point CL Reference line

Claims (7)

In 3D objects,
One side is a flat base, and
A three-dimensional structure formed integrally with the same material as the base on the one surface side of the base,
A balance adjusting portion provided on the other surface side of the base portion which is the installation surface side;
Have
The balance adjusting unit is configured such that the position of the center of gravity of the three-dimensional structure when the three-dimensional structure is viewed in plan from the one surface side of the base is compared with the case where the balance adjusting unit is not provided. A three-dimensional structure characterized by being set to approach the center of the base.   The three-dimensional structure according to claim 1, wherein a peripheral portion is provided on the other surface side of the base portion, and the balance adjusting portion does not protrude from the peripheral portion with respect to the installation surface.   The three-dimensional structure according to claim 1, wherein the balance adjusting unit is provided in a recess provided on the other surface side of the base.   When the three-dimensional structure is not provided with the balance adjustment unit, the position of the center of gravity of the three-dimensional structure when the three-dimensional structure is viewed in plan from the one surface side of the base portion is When the balance adjusting part is provided without being positioned on a vertical line passing through a suspension point when the three-dimensional structure is suspended from the installation surface, the three-dimensional structure is formed from the one surface side of the base portion. The balance adjusting unit is positioned so that the position of the center of gravity of the three-dimensional structure when the object is viewed in plan is located on a vertical line passing through a suspension point when the three-dimensional structure is suspended from the installation surface. The three-dimensional structure according to claim 1, wherein the three-dimensional structure is set.   The three-dimensional structure according to any one of claims 1 to 3, wherein the three-dimensional structure has a hollow portion therein. In the 3D modeling method,
The one surface side forms a flat plate-like base portion, and the three-dimensional modeling portion of the same material as the base portion on the one surface side of the base portion,
On the other surface side of the base portion that is the installation surface side, a position of the center of gravity of the three-dimensional structure when the three-dimensional structure is viewed in plan from the one surface side of the base portion is provided with a balance adjustment unit. Compared with the case where it is not, the said balance adjustment part is formed so that the center part of the said base part may be approached, The three-dimensional modeling method characterized by the above-mentioned.   When the balance adjusting unit is not provided, the position of the center of gravity of the three-dimensional structure when the three-dimensional structure is viewed in plan from the one surface side of the base portion is the installation position of the three-dimensional structure. When the three-dimensional structure is viewed in plan from the one surface side of the base portion when the balance adjustment portion is provided without being positioned on the vertical line passing through the suspension point when hanging on the surface. The balance adjusting unit is formed so that the position of the center of gravity of the three-dimensional structure is located on a vertical line passing through a suspension point when the three-dimensional structure is suspended from the installation surface. The three-dimensional modeling method according to claim 6.

Images